./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 76fd23ddcb7e8fff12decb053b84ed59e907e32bdbc4e822256bdb820e1311ef --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 23:12:56,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 23:12:56,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 23:12:56,821 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 23:12:56,822 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 23:12:56,824 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 23:12:56,826 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 23:12:56,828 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 23:12:56,830 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 23:12:56,832 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 23:12:56,833 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 23:12:56,834 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 23:12:56,835 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 23:12:56,837 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 23:12:56,838 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 23:12:56,840 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 23:12:56,842 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 23:12:56,843 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 23:12:56,845 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 23:12:56,848 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 23:12:56,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 23:12:56,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 23:12:56,854 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 23:12:56,855 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 23:12:56,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 23:12:56,860 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 23:12:56,860 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 23:12:56,861 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 23:12:56,862 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 23:12:56,863 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 23:12:56,864 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 23:12:56,865 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 23:12:56,866 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 23:12:56,867 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 23:12:56,869 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 23:12:56,869 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 23:12:56,870 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 23:12:56,870 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 23:12:56,871 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 23:12:56,872 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 23:12:56,873 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 23:12:56,874 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 23:12:56,899 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 23:12:56,900 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 23:12:56,900 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 23:12:56,900 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 23:12:56,901 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 23:12:56,902 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 23:12:56,902 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 23:12:56,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 23:12:56,903 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 23:12:56,903 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 23:12:56,903 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 23:12:56,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 23:12:56,904 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 23:12:56,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 23:12:56,905 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 23:12:56,905 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 23:12:56,905 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 23:12:56,905 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 23:12:56,906 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 23:12:56,906 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 23:12:56,906 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 23:12:56,907 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 23:12:56,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:12:56,907 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 23:12:56,908 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 23:12:56,908 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 23:12:56,908 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 23:12:56,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 23:12:56,909 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 23:12:56,909 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 23:12:56,909 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 23:12:56,910 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 23:12:56,910 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 76fd23ddcb7e8fff12decb053b84ed59e907e32bdbc4e822256bdb820e1311ef [2021-11-02 23:12:57,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 23:12:57,175 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 23:12:57,178 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 23:12:57,179 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 23:12:57,180 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 23:12:57,181 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c [2021-11-02 23:12:57,247 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/data/1d7a2d1b5/ee78bcc3dc4f4b0cbcc7c608eda397f6/FLAG0aaf30d91 [2021-11-02 23:12:57,692 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 23:12:57,693 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c [2021-11-02 23:12:57,707 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/data/1d7a2d1b5/ee78bcc3dc4f4b0cbcc7c608eda397f6/FLAG0aaf30d91 [2021-11-02 23:12:58,083 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/data/1d7a2d1b5/ee78bcc3dc4f4b0cbcc7c608eda397f6 [2021-11-02 23:12:58,086 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 23:12:58,087 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 23:12:58,089 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 23:12:58,089 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 23:12:58,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 23:12:58,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:12:58" (1/1) ... [2021-11-02 23:12:58,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ac10c74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:58, skipping insertion in model container [2021-11-02 23:12:58,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:12:58" (1/1) ... [2021-11-02 23:12:58,101 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 23:12:58,118 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:12:58,277 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c[490,503] [2021-11-02 23:12:58,296 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:12:58,305 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 23:12:58,316 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c[490,503] [2021-11-02 23:12:58,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:12:58,339 INFO L208 MainTranslator]: Completed translation [2021-11-02 23:12:58,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:58 WrapperNode [2021-11-02 23:12:58,340 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 23:12:58,341 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 23:12:58,341 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 23:12:58,341 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 23:12:58,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:58" (1/1) ... [2021-11-02 23:12:58,356 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:58" (1/1) ... [2021-11-02 23:12:58,379 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 23:12:58,380 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 23:12:58,380 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 23:12:58,380 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 23:12:58,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:58" (1/1) ... [2021-11-02 23:12:58,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:58" (1/1) ... [2021-11-02 23:12:58,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:58" (1/1) ... [2021-11-02 23:12:58,390 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:58" (1/1) ... [2021-11-02 23:12:58,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:58" (1/1) ... [2021-11-02 23:12:58,401 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:58" (1/1) ... [2021-11-02 23:12:58,402 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:58" (1/1) ... [2021-11-02 23:12:58,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 23:12:58,405 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 23:12:58,406 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 23:12:58,406 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 23:12:58,407 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:58" (1/1) ... [2021-11-02 23:12:58,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:12:58,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:58,442 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 23:12:58,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 23:12:58,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 23:12:58,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 23:12:58,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 23:12:58,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 23:12:58,770 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 23:12:58,770 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-11-02 23:12:58,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:12:58 BoogieIcfgContainer [2021-11-02 23:12:58,772 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 23:12:58,795 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 23:12:58,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 23:12:58,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 23:12:58,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:12:58" (1/3) ... [2021-11-02 23:12:58,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8fc4aeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:12:58, skipping insertion in model container [2021-11-02 23:12:58,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:58" (2/3) ... [2021-11-02 23:12:58,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8fc4aeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:12:58, skipping insertion in model container [2021-11-02 23:12:58,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:12:58" (3/3) ... [2021-11-02 23:12:58,805 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound10.c [2021-11-02 23:12:58,810 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 23:12:58,810 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-02 23:12:58,888 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 23:12:58,902 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 23:12:58,904 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-02 23:12:58,925 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 39 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:58,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-02 23:12:58,930 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:58,931 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:58,932 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:12:58,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:58,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1233339761, now seen corresponding path program 1 times [2021-11-02 23:12:58,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:58,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892531848] [2021-11-02 23:12:58,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:58,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:59,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:59,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:59,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:59,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892531848] [2021-11-02 23:12:59,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892531848] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:12:59,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:12:59,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 23:12:59,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888576588] [2021-11-02 23:12:59,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 23:12:59,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:59,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 23:12:59,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 23:12:59,108 INFO L87 Difference]: Start difference. First operand has 40 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 39 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:59,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:59,142 INFO L93 Difference]: Finished difference Result 77 states and 106 transitions. [2021-11-02 23:12:59,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 23:12:59,143 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-02 23:12:59,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:59,151 INFO L225 Difference]: With dead ends: 77 [2021-11-02 23:12:59,152 INFO L226 Difference]: Without dead ends: 36 [2021-11-02 23:12:59,154 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 23:12:59,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-02 23:12:59,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-02 23:12:59,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:59,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-11-02 23:12:59,188 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 10 [2021-11-02 23:12:59,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:59,189 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-11-02 23:12:59,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:59,189 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-11-02 23:12:59,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 23:12:59,190 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:59,190 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:59,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 23:12:59,191 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:12:59,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:59,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1507359540, now seen corresponding path program 1 times [2021-11-02 23:12:59,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:59,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153576829] [2021-11-02 23:12:59,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:59,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:59,219 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:12:59,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1819424278] [2021-11-02 23:12:59,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:59,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:59,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:59,226 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:59,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 23:12:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:59,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:12:59,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:59,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:59,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:59,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153576829] [2021-11-02 23:12:59,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:12:59,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819424278] [2021-11-02 23:12:59,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819424278] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:12:59,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:12:59,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:12:59,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652456821] [2021-11-02 23:12:59,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:12:59,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:59,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:12:59,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:12:59,442 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:59,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:59,478 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-11-02 23:12:59,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:12:59,479 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-02 23:12:59,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:59,480 INFO L225 Difference]: With dead ends: 42 [2021-11-02 23:12:59,480 INFO L226 Difference]: Without dead ends: 38 [2021-11-02 23:12:59,481 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:12:59,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-02 23:12:59,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-02 23:12:59,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.303030303030303) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:59,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-11-02 23:12:59,487 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 11 [2021-11-02 23:12:59,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:59,488 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-11-02 23:12:59,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:59,488 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-11-02 23:12:59,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-02 23:12:59,489 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:59,489 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:59,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 23:12:59,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:59,715 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:12:59,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:59,716 INFO L85 PathProgramCache]: Analyzing trace with hash 515746917, now seen corresponding path program 1 times [2021-11-02 23:12:59,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:59,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493347320] [2021-11-02 23:12:59,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:59,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:59,754 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:12:59,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1894485812] [2021-11-02 23:12:59,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:59,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:59,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:59,778 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:59,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 23:12:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:59,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 23:12:59,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:59,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:59,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:59,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493347320] [2021-11-02 23:12:59,959 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:12:59,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894485812] [2021-11-02 23:12:59,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894485812] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:12:59,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:12:59,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:12:59,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832938290] [2021-11-02 23:12:59,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:12:59,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:59,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:12:59,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:12:59,962 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:00,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:00,045 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2021-11-02 23:13:00,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:13:00,046 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-02 23:13:00,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:00,047 INFO L225 Difference]: With dead ends: 66 [2021-11-02 23:13:00,048 INFO L226 Difference]: Without dead ends: 62 [2021-11-02 23:13:00,048 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:13:00,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-02 23:13:00,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 39. [2021-11-02 23:13:00,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:00,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-11-02 23:13:00,056 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 12 [2021-11-02 23:13:00,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:00,056 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-11-02 23:13:00,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:00,056 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-11-02 23:13:00,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 23:13:00,057 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:00,057 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:00,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:00,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:00,283 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:13:00,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:00,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1270616931, now seen corresponding path program 1 times [2021-11-02 23:13:00,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:00,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200422207] [2021-11-02 23:13:00,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:00,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:00,313 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:13:00,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1828604556] [2021-11-02 23:13:00,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:00,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:00,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:00,331 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:00,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 23:13:00,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:00,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 23:13:00,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:00,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:00,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:00,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200422207] [2021-11-02 23:13:00,721 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:13:00,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828604556] [2021-11-02 23:13:00,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828604556] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:00,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:00,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 23:13:00,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233967349] [2021-11-02 23:13:00,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:13:00,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:00,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:13:00,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:13:00,724 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:00,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:00,852 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-11-02 23:13:00,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:13:00,853 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-02 23:13:00,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:00,854 INFO L225 Difference]: With dead ends: 62 [2021-11-02 23:13:00,855 INFO L226 Difference]: Without dead ends: 60 [2021-11-02 23:13:00,856 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:13:00,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-02 23:13:00,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2021-11-02 23:13:00,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 52 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:00,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2021-11-02 23:13:00,882 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 16 [2021-11-02 23:13:00,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:00,883 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2021-11-02 23:13:00,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:00,883 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2021-11-02 23:13:00,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 23:13:00,884 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:00,885 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:00,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:01,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:01,102 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:13:01,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:01,103 INFO L85 PathProgramCache]: Analyzing trace with hash -648504839, now seen corresponding path program 1 times [2021-11-02 23:13:01,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:01,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345263392] [2021-11-02 23:13:01,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:01,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:01,120 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:13:01,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012099435] [2021-11-02 23:13:01,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:01,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:01,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:01,122 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:01,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 23:13:01,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:01,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 23:13:01,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:01,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:01,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:01,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345263392] [2021-11-02 23:13:01,297 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:13:01,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012099435] [2021-11-02 23:13:01,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012099435] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:01,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:01,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:13:01,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28531812] [2021-11-02 23:13:01,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:13:01,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:01,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:13:01,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:13:01,299 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:01,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:01,339 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2021-11-02 23:13:01,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:13:01,340 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-02 23:13:01,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:01,342 INFO L225 Difference]: With dead ends: 85 [2021-11-02 23:13:01,344 INFO L226 Difference]: Without dead ends: 55 [2021-11-02 23:13:01,344 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:13:01,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-02 23:13:01,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-11-02 23:13:01,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.34) internal successors, (67), 54 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:01,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2021-11-02 23:13:01,356 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 17 [2021-11-02 23:13:01,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:01,356 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2021-11-02 23:13:01,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:01,357 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2021-11-02 23:13:01,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 23:13:01,358 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:01,358 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:01,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-02 23:13:01,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:01,575 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:13:01,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:01,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1354097033, now seen corresponding path program 1 times [2021-11-02 23:13:01,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:01,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2766114] [2021-11-02 23:13:01,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:01,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:01,590 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:13:01,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [370854232] [2021-11-02 23:13:01,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:01,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:01,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:01,592 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:01,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 23:13:01,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:01,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 23:13:01,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:01,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:01,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:01,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2766114] [2021-11-02 23:13:01,749 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:13:01,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370854232] [2021-11-02 23:13:01,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370854232] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:01,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:13:01,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-02 23:13:01,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384924984] [2021-11-02 23:13:01,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:13:01,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:01,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:13:01,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:13:01,752 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:01,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:01,779 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2021-11-02 23:13:01,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:13:01,780 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-02 23:13:01,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:01,781 INFO L225 Difference]: With dead ends: 64 [2021-11-02 23:13:01,781 INFO L226 Difference]: Without dead ends: 60 [2021-11-02 23:13:01,781 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:13:01,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-02 23:13:01,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-11-02 23:13:01,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.3333333333333333) internal successors, (72), 58 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:01,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2021-11-02 23:13:01,796 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 18 [2021-11-02 23:13:01,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:01,796 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2021-11-02 23:13:01,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:01,796 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2021-11-02 23:13:01,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 23:13:01,797 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:01,797 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:01,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:02,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:02,012 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:13:02,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:02,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1292001664, now seen corresponding path program 1 times [2021-11-02 23:13:02,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:02,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774725904] [2021-11-02 23:13:02,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:02,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:02,028 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:13:02,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603063888] [2021-11-02 23:13:02,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:02,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:02,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:02,029 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:02,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 23:13:02,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:02,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 23:13:02,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:02,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:02,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774725904] [2021-11-02 23:13:02,467 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:13:02,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603063888] [2021-11-02 23:13:02,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603063888] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:02,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:02,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 23:13:02,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522740160] [2021-11-02 23:13:02,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:13:02,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:02,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:13:02,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:13:02,472 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:02,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:02,811 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2021-11-02 23:13:02,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 23:13:02,812 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-02 23:13:02,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:02,813 INFO L225 Difference]: With dead ends: 82 [2021-11-02 23:13:02,819 INFO L226 Difference]: Without dead ends: 80 [2021-11-02 23:13:02,820 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:13:02,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-02 23:13:02,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 59. [2021-11-02 23:13:02,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 58 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:02,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2021-11-02 23:13:02,832 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 18 [2021-11-02 23:13:02,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:02,833 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2021-11-02 23:13:02,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:02,833 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2021-11-02 23:13:02,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 23:13:02,834 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:02,834 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:02,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:03,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-02 23:13:03,039 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:13:03,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:03,039 INFO L85 PathProgramCache]: Analyzing trace with hash 971917338, now seen corresponding path program 1 times [2021-11-02 23:13:03,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:03,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307613489] [2021-11-02 23:13:03,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:03,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:03,052 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:13:03,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1190860193] [2021-11-02 23:13:03,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:03,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:03,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:03,053 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:03,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 23:13:03,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:03,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 23:13:03,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:03,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:03,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307613489] [2021-11-02 23:13:03,258 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:13:03,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190860193] [2021-11-02 23:13:03,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190860193] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:03,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:13:03,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-02 23:13:03,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120530555] [2021-11-02 23:13:03,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:13:03,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:03,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:13:03,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:13:03,262 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:03,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:03,445 INFO L93 Difference]: Finished difference Result 191 states and 227 transitions. [2021-11-02 23:13:03,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 23:13:03,446 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-02 23:13:03,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:03,449 INFO L225 Difference]: With dead ends: 191 [2021-11-02 23:13:03,449 INFO L226 Difference]: Without dead ends: 187 [2021-11-02 23:13:03,450 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:13:03,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-02 23:13:03,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 91. [2021-11-02 23:13:03,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.3837209302325582) internal successors, (119), 90 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:03,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 119 transitions. [2021-11-02 23:13:03,479 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 119 transitions. Word has length 19 [2021-11-02 23:13:03,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:03,480 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 119 transitions. [2021-11-02 23:13:03,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:03,480 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 119 transitions. [2021-11-02 23:13:03,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 23:13:03,482 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:03,483 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:03,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:03,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:03,697 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:13:03,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:03,697 INFO L85 PathProgramCache]: Analyzing trace with hash -367893245, now seen corresponding path program 1 times [2021-11-02 23:13:03,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:03,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327410729] [2021-11-02 23:13:03,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:03,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:03,711 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:13:03,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1401479618] [2021-11-02 23:13:03,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:03,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:03,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:03,713 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:03,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 23:13:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:03,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 23:13:03,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:04,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:04,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:04,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327410729] [2021-11-02 23:13:04,027 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:13:04,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401479618] [2021-11-02 23:13:04,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401479618] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:04,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:04,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 23:13:04,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143291755] [2021-11-02 23:13:04,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:13:04,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:04,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:13:04,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:13:04,033 INFO L87 Difference]: Start difference. First operand 91 states and 119 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:04,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:04,195 INFO L93 Difference]: Finished difference Result 111 states and 139 transitions. [2021-11-02 23:13:04,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:13:04,199 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-02 23:13:04,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:04,200 INFO L225 Difference]: With dead ends: 111 [2021-11-02 23:13:04,200 INFO L226 Difference]: Without dead ends: 109 [2021-11-02 23:13:04,201 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:13:04,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-02 23:13:04,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 101. [2021-11-02 23:13:04,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.375) internal successors, (132), 100 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:04,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 132 transitions. [2021-11-02 23:13:04,212 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 132 transitions. Word has length 20 [2021-11-02 23:13:04,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:04,213 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 132 transitions. [2021-11-02 23:13:04,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:04,213 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 132 transitions. [2021-11-02 23:13:04,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-02 23:13:04,214 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:04,214 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:04,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:04,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:04,443 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:13:04,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:04,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1357932506, now seen corresponding path program 1 times [2021-11-02 23:13:04,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:04,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046554144] [2021-11-02 23:13:04,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:04,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:04,457 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:13:04,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1723468830] [2021-11-02 23:13:04,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:04,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:04,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:04,458 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:04,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 23:13:04,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:04,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 23:13:04,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:04,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:04,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:04,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046554144] [2021-11-02 23:13:04,697 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:13:04,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723468830] [2021-11-02 23:13:04,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723468830] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:04,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:04,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:13:04,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77911377] [2021-11-02 23:13:04,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:13:04,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:04,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:13:04,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:13:04,702 INFO L87 Difference]: Start difference. First operand 101 states and 132 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:04,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:04,780 INFO L93 Difference]: Finished difference Result 226 states and 307 transitions. [2021-11-02 23:13:04,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:13:04,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-02 23:13:04,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:04,784 INFO L225 Difference]: With dead ends: 226 [2021-11-02 23:13:04,784 INFO L226 Difference]: Without dead ends: 224 [2021-11-02 23:13:04,785 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:13:04,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-11-02 23:13:04,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 137. [2021-11-02 23:13:04,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.356060606060606) internal successors, (179), 136 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:04,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 179 transitions. [2021-11-02 23:13:04,809 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 179 transitions. Word has length 22 [2021-11-02 23:13:04,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:04,810 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 179 transitions. [2021-11-02 23:13:04,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:04,810 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 179 transitions. [2021-11-02 23:13:04,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-02 23:13:04,813 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:04,813 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:04,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:05,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 23:13:05,026 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:13:05,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:05,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1235592658, now seen corresponding path program 1 times [2021-11-02 23:13:05,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:05,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56249997] [2021-11-02 23:13:05,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:05,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:05,040 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:13:05,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530828417] [2021-11-02 23:13:05,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:05,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:05,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:05,050 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:05,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 23:13:05,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:05,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 23:13:05,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:05,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:05,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:05,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56249997] [2021-11-02 23:13:05,462 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:13:05,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530828417] [2021-11-02 23:13:05,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530828417] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:05,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:13:05,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-02 23:13:05,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985748696] [2021-11-02 23:13:05,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:13:05,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:05,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:13:05,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:13:05,464 INFO L87 Difference]: Start difference. First operand 137 states and 179 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:05,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:05,607 INFO L93 Difference]: Finished difference Result 210 states and 273 transitions. [2021-11-02 23:13:05,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 23:13:05,608 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-02 23:13:05,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:05,609 INFO L225 Difference]: With dead ends: 210 [2021-11-02 23:13:05,609 INFO L226 Difference]: Without dead ends: 208 [2021-11-02 23:13:05,610 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:13:05,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-02 23:13:05,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 191. [2021-11-02 23:13:05,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.381720430107527) internal successors, (257), 190 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:05,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 257 transitions. [2021-11-02 23:13:05,628 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 257 transitions. Word has length 23 [2021-11-02 23:13:05,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:05,629 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 257 transitions. [2021-11-02 23:13:05,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:05,629 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 257 transitions. [2021-11-02 23:13:05,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-02 23:13:05,630 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:05,630 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:05,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:05,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:05,846 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:13:05,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:05,847 INFO L85 PathProgramCache]: Analyzing trace with hash -138249927, now seen corresponding path program 1 times [2021-11-02 23:13:05,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:05,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571752434] [2021-11-02 23:13:05,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:05,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:05,863 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:13:05,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1329515109] [2021-11-02 23:13:05,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:05,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:05,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:05,864 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:05,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 23:13:06,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:06,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 23:13:06,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:06,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:06,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571752434] [2021-11-02 23:13:06,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:13:06,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329515109] [2021-11-02 23:13:06,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329515109] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:06,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:06,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:13:06,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995431933] [2021-11-02 23:13:06,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:13:06,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:06,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:13:06,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:13:06,136 INFO L87 Difference]: Start difference. First operand 191 states and 257 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:06,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:06,170 INFO L93 Difference]: Finished difference Result 280 states and 375 transitions. [2021-11-02 23:13:06,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:13:06,171 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-02 23:13:06,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:06,172 INFO L225 Difference]: With dead ends: 280 [2021-11-02 23:13:06,173 INFO L226 Difference]: Without dead ends: 191 [2021-11-02 23:13:06,174 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:13:06,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-02 23:13:06,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-11-02 23:13:06,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.3763440860215055) internal successors, (256), 190 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:06,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 256 transitions. [2021-11-02 23:13:06,192 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 256 transitions. Word has length 23 [2021-11-02 23:13:06,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:06,193 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 256 transitions. [2021-11-02 23:13:06,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:06,193 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 256 transitions. [2021-11-02 23:13:06,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 23:13:06,197 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:06,197 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:06,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:06,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:06,426 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:13:06,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:06,427 INFO L85 PathProgramCache]: Analyzing trace with hash -265418908, now seen corresponding path program 1 times [2021-11-02 23:13:06,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:06,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724960926] [2021-11-02 23:13:06,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:06,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:06,438 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:13:06,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87748104] [2021-11-02 23:13:06,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:06,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:06,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:06,440 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:06,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 23:13:06,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:06,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 23:13:06,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:06,704 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:06,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:06,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724960926] [2021-11-02 23:13:06,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:13:06,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87748104] [2021-11-02 23:13:06,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87748104] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:06,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:13:06,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-02 23:13:06,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255800230] [2021-11-02 23:13:06,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:13:06,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:06,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:13:06,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:13:06,708 INFO L87 Difference]: Start difference. First operand 191 states and 256 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:06,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:06,759 INFO L93 Difference]: Finished difference Result 303 states and 411 transitions. [2021-11-02 23:13:06,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:13:06,759 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-02 23:13:06,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:06,763 INFO L225 Difference]: With dead ends: 303 [2021-11-02 23:13:06,763 INFO L226 Difference]: Without dead ends: 196 [2021-11-02 23:13:06,767 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:13:06,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-02 23:13:06,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2021-11-02 23:13:06,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.368421052631579) internal successors, (260), 194 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:06,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 260 transitions. [2021-11-02 23:13:06,784 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 260 transitions. Word has length 24 [2021-11-02 23:13:06,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:06,784 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 260 transitions. [2021-11-02 23:13:06,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:06,785 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 260 transitions. [2021-11-02 23:13:06,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-02 23:13:06,786 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:06,787 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:06,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:07,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:07,003 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:13:07,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:07,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1931632236, now seen corresponding path program 2 times [2021-11-02 23:13:07,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:07,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860933915] [2021-11-02 23:13:07,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:07,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:07,021 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:13:07,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [501923963] [2021-11-02 23:13:07,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:13:07,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:07,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:07,027 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:07,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 23:13:07,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:13:07,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:07,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 23:13:07,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:07,321 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:07,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:07,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860933915] [2021-11-02 23:13:07,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:13:07,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501923963] [2021-11-02 23:13:07,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501923963] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:07,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:13:07,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-02 23:13:07,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827487166] [2021-11-02 23:13:07,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:13:07,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:07,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:13:07,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:13:07,326 INFO L87 Difference]: Start difference. First operand 195 states and 260 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:07,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:07,384 INFO L93 Difference]: Finished difference Result 223 states and 292 transitions. [2021-11-02 23:13:07,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 23:13:07,384 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-02 23:13:07,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:07,386 INFO L225 Difference]: With dead ends: 223 [2021-11-02 23:13:07,386 INFO L226 Difference]: Without dead ends: 219 [2021-11-02 23:13:07,387 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:13:07,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-11-02 23:13:07,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 202. [2021-11-02 23:13:07,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.3604060913705585) internal successors, (268), 201 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:07,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 268 transitions. [2021-11-02 23:13:07,411 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 268 transitions. Word has length 25 [2021-11-02 23:13:07,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:07,412 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 268 transitions. [2021-11-02 23:13:07,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:07,412 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 268 transitions. [2021-11-02 23:13:07,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-02 23:13:07,412 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:07,413 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:07,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:07,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-02 23:13:07,638 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:13:07,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:07,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1993727605, now seen corresponding path program 1 times [2021-11-02 23:13:07,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:07,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567296386] [2021-11-02 23:13:07,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:07,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:07,649 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:13:07,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619205695] [2021-11-02 23:13:07,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:07,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:07,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:07,651 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:07,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 23:13:07,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:07,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-02 23:13:07,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:08,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:08,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:08,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567296386] [2021-11-02 23:13:08,177 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:13:08,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619205695] [2021-11-02 23:13:08,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619205695] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:08,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:13:08,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-02 23:13:08,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000302732] [2021-11-02 23:13:08,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:13:08,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:08,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:13:08,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:13:08,179 INFO L87 Difference]: Start difference. First operand 202 states and 268 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:08,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:08,343 INFO L93 Difference]: Finished difference Result 216 states and 276 transitions. [2021-11-02 23:13:08,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:13:08,343 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-02 23:13:08,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:08,345 INFO L225 Difference]: With dead ends: 216 [2021-11-02 23:13:08,345 INFO L226 Difference]: Without dead ends: 214 [2021-11-02 23:13:08,346 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:13:08,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-02 23:13:08,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 202. [2021-11-02 23:13:08,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.350253807106599) internal successors, (266), 201 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:08,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 266 transitions. [2021-11-02 23:13:08,366 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 266 transitions. Word has length 25 [2021-11-02 23:13:08,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:08,367 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 266 transitions. [2021-11-02 23:13:08,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:08,367 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 266 transitions. [2021-11-02 23:13:08,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-02 23:13:08,368 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:08,368 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:08,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:08,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-02 23:13:08,595 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:13:08,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:08,595 INFO L85 PathProgramCache]: Analyzing trace with hash 416971704, now seen corresponding path program 1 times [2021-11-02 23:13:08,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:08,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190791680] [2021-11-02 23:13:08,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:08,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:08,620 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:13:08,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890218665] [2021-11-02 23:13:08,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:08,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:08,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:08,624 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:08,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 23:13:08,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:08,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 23:13:08,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:09,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:09,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:09,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190791680] [2021-11-02 23:13:09,039 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:13:09,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890218665] [2021-11-02 23:13:09,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890218665] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:09,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:13:09,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-02 23:13:09,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322412843] [2021-11-02 23:13:09,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:13:09,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:09,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:13:09,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:13:09,041 INFO L87 Difference]: Start difference. First operand 202 states and 266 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:09,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:09,325 INFO L93 Difference]: Finished difference Result 336 states and 421 transitions. [2021-11-02 23:13:09,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 23:13:09,326 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-02 23:13:09,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:09,329 INFO L225 Difference]: With dead ends: 336 [2021-11-02 23:13:09,329 INFO L226 Difference]: Without dead ends: 334 [2021-11-02 23:13:09,330 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:13:09,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-11-02 23:13:09,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 243. [2021-11-02 23:13:09,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.3487394957983194) internal successors, (321), 242 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:09,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 321 transitions. [2021-11-02 23:13:09,356 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 321 transitions. Word has length 27 [2021-11-02 23:13:09,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:09,357 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 321 transitions. [2021-11-02 23:13:09,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:09,358 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 321 transitions. [2021-11-02 23:13:09,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 23:13:09,359 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:09,359 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:09,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-02 23:13:09,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 23:13:09,574 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:13:09,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:09,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1345328893, now seen corresponding path program 2 times [2021-11-02 23:13:09,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:09,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111318912] [2021-11-02 23:13:09,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:09,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:09,585 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:13:09,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1860577748] [2021-11-02 23:13:09,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:13:09,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:09,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:09,586 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:09,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 23:13:09,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:13:09,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:09,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 23:13:09,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:09,902 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:09,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:09,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111318912] [2021-11-02 23:13:09,903 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:13:09,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860577748] [2021-11-02 23:13:09,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860577748] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:09,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:09,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:13:09,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311878667] [2021-11-02 23:13:09,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:13:09,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:09,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:13:09,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:13:09,905 INFO L87 Difference]: Start difference. First operand 243 states and 321 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:10,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:10,017 INFO L93 Difference]: Finished difference Result 530 states and 713 transitions. [2021-11-02 23:13:10,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:13:10,018 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-02 23:13:10,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:10,020 INFO L225 Difference]: With dead ends: 530 [2021-11-02 23:13:10,021 INFO L226 Difference]: Without dead ends: 425 [2021-11-02 23:13:10,021 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:13:10,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-11-02 23:13:10,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 267. [2021-11-02 23:13:10,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 262 states have (on average 1.3549618320610688) internal successors, (355), 266 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:10,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 355 transitions. [2021-11-02 23:13:10,047 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 355 transitions. Word has length 30 [2021-11-02 23:13:10,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:10,047 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 355 transitions. [2021-11-02 23:13:10,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:10,047 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 355 transitions. [2021-11-02 23:13:10,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 23:13:10,048 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:10,048 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:10,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:10,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-02 23:13:10,266 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:13:10,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:10,266 INFO L85 PathProgramCache]: Analyzing trace with hash -28513692, now seen corresponding path program 1 times [2021-11-02 23:13:10,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:10,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398367626] [2021-11-02 23:13:10,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:10,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:10,275 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:13:10,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1383190698] [2021-11-02 23:13:10,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:10,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:10,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:10,277 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:10,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-02 23:13:10,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:10,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 23:13:10,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:10,598 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:10,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:10,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398367626] [2021-11-02 23:13:10,598 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:13:10,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383190698] [2021-11-02 23:13:10,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383190698] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:10,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:13:10,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-02 23:13:10,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107241042] [2021-11-02 23:13:10,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:13:10,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:10,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:13:10,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:13:10,601 INFO L87 Difference]: Start difference. First operand 267 states and 355 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:10,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:10,675 INFO L93 Difference]: Finished difference Result 487 states and 657 transitions. [2021-11-02 23:13:10,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 23:13:10,676 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-02 23:13:10,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:10,678 INFO L225 Difference]: With dead ends: 487 [2021-11-02 23:13:10,678 INFO L226 Difference]: Without dead ends: 285 [2021-11-02 23:13:10,679 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:13:10,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-02 23:13:10,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 281. [2021-11-02 23:13:10,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 276 states have (on average 1.3405797101449275) internal successors, (370), 280 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:10,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 370 transitions. [2021-11-02 23:13:10,704 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 370 transitions. Word has length 30 [2021-11-02 23:13:10,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:10,704 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 370 transitions. [2021-11-02 23:13:10,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:10,705 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 370 transitions. [2021-11-02 23:13:10,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 23:13:10,705 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:10,705 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:10,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:10,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 23:13:10,926 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:13:10,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:10,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1302269029, now seen corresponding path program 1 times [2021-11-02 23:13:10,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:10,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468329981] [2021-11-02 23:13:10,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:10,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:10,946 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:13:10,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [557459770] [2021-11-02 23:13:10,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:10,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:10,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:10,954 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:10,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-02 23:13:11,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:11,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 23:13:11,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:11,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:11,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:11,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468329981] [2021-11-02 23:13:11,477 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:13:11,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557459770] [2021-11-02 23:13:11,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557459770] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:11,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:13:11,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-02 23:13:11,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214432348] [2021-11-02 23:13:11,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:13:11,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:11,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:13:11,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:13:11,479 INFO L87 Difference]: Start difference. First operand 281 states and 370 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:11,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:11,791 INFO L93 Difference]: Finished difference Result 363 states and 478 transitions. [2021-11-02 23:13:11,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 23:13:11,791 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-02 23:13:11,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:11,794 INFO L225 Difference]: With dead ends: 363 [2021-11-02 23:13:11,794 INFO L226 Difference]: Without dead ends: 361 [2021-11-02 23:13:11,794 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:13:11,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-11-02 23:13:11,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 291. [2021-11-02 23:13:11,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 286 states have (on average 1.3356643356643356) internal successors, (382), 290 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:11,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 382 transitions. [2021-11-02 23:13:11,825 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 382 transitions. Word has length 32 [2021-11-02 23:13:11,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:11,825 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 382 transitions. [2021-11-02 23:13:11,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:11,825 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 382 transitions. [2021-11-02 23:13:11,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-02 23:13:11,826 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:11,826 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:11,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:12,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:12,050 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:13:12,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:12,051 INFO L85 PathProgramCache]: Analyzing trace with hash 885134474, now seen corresponding path program 1 times [2021-11-02 23:13:12,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:12,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562343619] [2021-11-02 23:13:12,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:12,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:12,061 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:13:12,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [767498994] [2021-11-02 23:13:12,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:12,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:12,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:12,063 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:12,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-02 23:13:12,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:12,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-02 23:13:12,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:13,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:13,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:13,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562343619] [2021-11-02 23:13:13,254 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:13:13,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767498994] [2021-11-02 23:13:13,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767498994] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:13,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:13:13,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-02 23:13:13,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718857710] [2021-11-02 23:13:13,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:13:13,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:13,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:13:13,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:13:13,256 INFO L87 Difference]: Start difference. First operand 291 states and 382 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:13,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:13,790 INFO L93 Difference]: Finished difference Result 395 states and 508 transitions. [2021-11-02 23:13:13,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 23:13:13,790 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-02 23:13:13,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:13,793 INFO L225 Difference]: With dead ends: 395 [2021-11-02 23:13:13,793 INFO L226 Difference]: Without dead ends: 387 [2021-11-02 23:13:13,794 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:13:13,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-02 23:13:13,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 335. [2021-11-02 23:13:13,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 330 states have (on average 1.3242424242424242) internal successors, (437), 334 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:13,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 437 transitions. [2021-11-02 23:13:13,838 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 437 transitions. Word has length 33 [2021-11-02 23:13:13,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:13,839 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 437 transitions. [2021-11-02 23:13:13,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:13,839 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 437 transitions. [2021-11-02 23:13:13,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-02 23:13:13,840 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:13,840 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:13,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:14,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:14,054 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:13:14,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:14,055 INFO L85 PathProgramCache]: Analyzing trace with hash 731699348, now seen corresponding path program 1 times [2021-11-02 23:13:14,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:14,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170031225] [2021-11-02 23:13:14,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:14,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:14,072 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:13:14,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1903561913] [2021-11-02 23:13:14,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:14,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:14,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:14,075 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:14,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-02 23:13:14,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:14,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 23:13:14,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:14,608 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:14,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:14,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170031225] [2021-11-02 23:13:14,609 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:13:14,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903561913] [2021-11-02 23:13:14,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903561913] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:14,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:13:14,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-02 23:13:14,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446497815] [2021-11-02 23:13:14,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:13:14,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:14,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:13:14,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:13:14,613 INFO L87 Difference]: Start difference. First operand 335 states and 437 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:14,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:14,716 INFO L93 Difference]: Finished difference Result 510 states and 677 transitions. [2021-11-02 23:13:14,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 23:13:14,717 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-02 23:13:14,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:14,719 INFO L225 Difference]: With dead ends: 510 [2021-11-02 23:13:14,720 INFO L226 Difference]: Without dead ends: 361 [2021-11-02 23:13:14,720 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:13:14,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-11-02 23:13:14,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 350. [2021-11-02 23:13:14,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 345 states have (on average 1.3159420289855073) internal successors, (454), 349 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:14,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 454 transitions. [2021-11-02 23:13:14,766 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 454 transitions. Word has length 38 [2021-11-02 23:13:14,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:14,766 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 454 transitions. [2021-11-02 23:13:14,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:14,766 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 454 transitions. [2021-11-02 23:13:14,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-02 23:13:14,767 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:14,767 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:14,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:14,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:14,993 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:13:14,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:14,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1517440196, now seen corresponding path program 1 times [2021-11-02 23:13:14,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:14,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608581027] [2021-11-02 23:13:14,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:14,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:15,015 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:13:15,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104572356] [2021-11-02 23:13:15,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:15,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:15,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:15,017 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:15,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-02 23:13:15,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:15,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 23:13:15,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:15,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:15,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608581027] [2021-11-02 23:13:15,560 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:13:15,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104572356] [2021-11-02 23:13:15,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104572356] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:15,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:13:15,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-02 23:13:15,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830574297] [2021-11-02 23:13:15,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 23:13:15,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:15,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 23:13:15,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:13:15,563 INFO L87 Difference]: Start difference. First operand 350 states and 454 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:15,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:15,692 INFO L93 Difference]: Finished difference Result 421 states and 536 transitions. [2021-11-02 23:13:15,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 23:13:15,695 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-02 23:13:15,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:15,701 INFO L225 Difference]: With dead ends: 421 [2021-11-02 23:13:15,702 INFO L226 Difference]: Without dead ends: 417 [2021-11-02 23:13:15,702 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:13:15,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-11-02 23:13:15,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 358. [2021-11-02 23:13:15,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 353 states have (on average 1.3144475920679888) internal successors, (464), 357 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:15,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 464 transitions. [2021-11-02 23:13:15,749 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 464 transitions. Word has length 39 [2021-11-02 23:13:15,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:15,750 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 464 transitions. [2021-11-02 23:13:15,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:15,750 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 464 transitions. [2021-11-02 23:13:15,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-02 23:13:15,751 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:15,751 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:15,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-11-02 23:13:15,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:15,966 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:13:15,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:15,967 INFO L85 PathProgramCache]: Analyzing trace with hash -631528752, now seen corresponding path program 1 times [2021-11-02 23:13:15,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:15,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428914704] [2021-11-02 23:13:15,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:15,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:15,980 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:13:15,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [114604610] [2021-11-02 23:13:15,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:15,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:15,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:15,982 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:16,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-02 23:13:16,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:16,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 23:13:16,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:16,734 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:16,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:16,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428914704] [2021-11-02 23:13:16,735 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:13:16,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114604610] [2021-11-02 23:13:16,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114604610] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:16,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:13:16,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-02 23:13:16,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761143758] [2021-11-02 23:13:16,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 23:13:16,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:16,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 23:13:16,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:13:16,737 INFO L87 Difference]: Start difference. First operand 358 states and 464 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:17,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:17,461 INFO L93 Difference]: Finished difference Result 746 states and 961 transitions. [2021-11-02 23:13:17,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-02 23:13:17,462 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-02 23:13:17,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:17,465 INFO L225 Difference]: With dead ends: 746 [2021-11-02 23:13:17,466 INFO L226 Difference]: Without dead ends: 744 [2021-11-02 23:13:17,467 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=1079, Unknown=0, NotChecked=0, Total=1406 [2021-11-02 23:13:17,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-11-02 23:13:17,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 397. [2021-11-02 23:13:17,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 392 states have (on average 1.316326530612245) internal successors, (516), 396 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:17,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 516 transitions. [2021-11-02 23:13:17,510 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 516 transitions. Word has length 39 [2021-11-02 23:13:17,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:17,510 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 516 transitions. [2021-11-02 23:13:17,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:17,511 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 516 transitions. [2021-11-02 23:13:17,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-02 23:13:17,512 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:17,512 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:17,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:17,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-02 23:13:17,737 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:13:17,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:17,738 INFO L85 PathProgramCache]: Analyzing trace with hash 203246581, now seen corresponding path program 2 times [2021-11-02 23:13:17,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:17,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208192302] [2021-11-02 23:13:17,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:17,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:17,749 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:13:17,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1913396607] [2021-11-02 23:13:17,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:13:17,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:17,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:17,753 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:17,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-02 23:13:18,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:13:18,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:18,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 23:13:18,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:18,287 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:18,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:18,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208192302] [2021-11-02 23:13:18,289 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:13:18,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913396607] [2021-11-02 23:13:18,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913396607] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:18,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:13:18,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-02 23:13:18,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606240796] [2021-11-02 23:13:18,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:13:18,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:18,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:13:18,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:13:18,292 INFO L87 Difference]: Start difference. First operand 397 states and 516 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:18,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:18,707 INFO L93 Difference]: Finished difference Result 967 states and 1267 transitions. [2021-11-02 23:13:18,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 23:13:18,708 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-02 23:13:18,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:18,713 INFO L225 Difference]: With dead ends: 967 [2021-11-02 23:13:18,714 INFO L226 Difference]: Without dead ends: 963 [2021-11-02 23:13:18,714 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:13:18,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-11-02 23:13:18,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 471. [2021-11-02 23:13:18,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 466 states have (on average 1.3283261802575108) internal successors, (619), 470 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:18,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 619 transitions. [2021-11-02 23:13:18,775 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 619 transitions. Word has length 40 [2021-11-02 23:13:18,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:18,775 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 619 transitions. [2021-11-02 23:13:18,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:18,776 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 619 transitions. [2021-11-02 23:13:18,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-02 23:13:18,776 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:18,777 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:18,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:19,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-02 23:13:19,002 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:13:19,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:19,003 INFO L85 PathProgramCache]: Analyzing trace with hash 905429967, now seen corresponding path program 1 times [2021-11-02 23:13:19,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:19,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266038308] [2021-11-02 23:13:19,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:19,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:19,017 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:13:19,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [779381380] [2021-11-02 23:13:19,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:19,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:19,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:19,019 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:19,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-02 23:13:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:19,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 23:13:19,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:19,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:19,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266038308] [2021-11-02 23:13:19,521 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:13:19,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779381380] [2021-11-02 23:13:19,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779381380] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:19,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:13:19,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-02 23:13:19,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116600687] [2021-11-02 23:13:19,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:13:19,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:19,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:13:19,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:13:19,522 INFO L87 Difference]: Start difference. First operand 471 states and 619 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:19,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:19,607 INFO L93 Difference]: Finished difference Result 785 states and 1052 transitions. [2021-11-02 23:13:19,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 23:13:19,620 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-02 23:13:19,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:19,623 INFO L225 Difference]: With dead ends: 785 [2021-11-02 23:13:19,623 INFO L226 Difference]: Without dead ends: 483 [2021-11-02 23:13:19,624 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:13:19,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-11-02 23:13:19,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 479. [2021-11-02 23:13:19,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 474 states have (on average 1.3206751054852321) internal successors, (626), 478 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:19,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 626 transitions. [2021-11-02 23:13:19,676 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 626 transitions. Word has length 40 [2021-11-02 23:13:19,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:19,676 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 626 transitions. [2021-11-02 23:13:19,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:19,677 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 626 transitions. [2021-11-02 23:13:19,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 23:13:19,677 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:19,678 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:19,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:19,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-02 23:13:19,890 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:13:19,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:19,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1573117064, now seen corresponding path program 1 times [2021-11-02 23:13:19,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:19,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891432387] [2021-11-02 23:13:19,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:19,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:19,911 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:13:19,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [636698075] [2021-11-02 23:13:19,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:19,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:19,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:19,915 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:19,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-02 23:13:20,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:20,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 23:13:20,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:20,407 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 23:13:20,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:20,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891432387] [2021-11-02 23:13:20,408 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:13:20,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636698075] [2021-11-02 23:13:20,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636698075] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:20,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:20,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:13:20,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059907754] [2021-11-02 23:13:20,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:13:20,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:20,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:13:20,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:13:20,410 INFO L87 Difference]: Start difference. First operand 479 states and 626 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:20,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:20,502 INFO L93 Difference]: Finished difference Result 906 states and 1214 transitions. [2021-11-02 23:13:20,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:13:20,503 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-02 23:13:20,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:20,506 INFO L225 Difference]: With dead ends: 906 [2021-11-02 23:13:20,507 INFO L226 Difference]: Without dead ends: 545 [2021-11-02 23:13:20,508 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:13:20,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-11-02 23:13:20,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 483. [2021-11-02 23:13:20,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 478 states have (on average 1.3284518828451883) internal successors, (635), 482 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:20,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 635 transitions. [2021-11-02 23:13:20,573 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 635 transitions. Word has length 41 [2021-11-02 23:13:20,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:20,573 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 635 transitions. [2021-11-02 23:13:20,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:20,574 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 635 transitions. [2021-11-02 23:13:20,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 23:13:20,574 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:20,575 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:20,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:20,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-02 23:13:20,798 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:13:20,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:20,799 INFO L85 PathProgramCache]: Analyzing trace with hash -149759960, now seen corresponding path program 2 times [2021-11-02 23:13:20,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:20,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291645992] [2021-11-02 23:13:20,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:20,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:20,816 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:13:20,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [120696668] [2021-11-02 23:13:20,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:13:20,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:20,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:20,818 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:20,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-02 23:13:21,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-02 23:13:21,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:21,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 23:13:21,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:21,427 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 23:13:21,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:21,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291645992] [2021-11-02 23:13:21,428 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:13:21,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120696668] [2021-11-02 23:13:21,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120696668] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:21,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:21,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:13:21,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103144698] [2021-11-02 23:13:21,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:13:21,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:21,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:13:21,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:13:21,430 INFO L87 Difference]: Start difference. First operand 483 states and 635 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:21,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:21,539 INFO L93 Difference]: Finished difference Result 560 states and 736 transitions. [2021-11-02 23:13:21,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:13:21,539 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-02 23:13:21,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:21,543 INFO L225 Difference]: With dead ends: 560 [2021-11-02 23:13:21,543 INFO L226 Difference]: Without dead ends: 558 [2021-11-02 23:13:21,544 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:13:21,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-11-02 23:13:21,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 539. [2021-11-02 23:13:21,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 534 states have (on average 1.3314606741573034) internal successors, (711), 538 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:21,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 711 transitions. [2021-11-02 23:13:21,608 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 711 transitions. Word has length 41 [2021-11-02 23:13:21,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:21,609 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 711 transitions. [2021-11-02 23:13:21,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:21,609 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 711 transitions. [2021-11-02 23:13:21,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-02 23:13:21,610 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:21,610 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:21,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-11-02 23:13:21,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-02 23:13:21,826 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:13:21,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:21,827 INFO L85 PathProgramCache]: Analyzing trace with hash -595443504, now seen corresponding path program 2 times [2021-11-02 23:13:21,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:21,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44430044] [2021-11-02 23:13:21,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:21,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:21,849 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:13:21,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [6061524] [2021-11-02 23:13:21,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:13:21,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:21,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:21,851 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:21,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-02 23:13:22,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:13:22,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:22,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 23:13:22,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:22,700 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:22,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:22,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44430044] [2021-11-02 23:13:22,701 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:13:22,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6061524] [2021-11-02 23:13:22,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6061524] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:22,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:13:22,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-02 23:13:22,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6483661] [2021-11-02 23:13:22,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:13:22,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:22,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:13:22,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:13:22,702 INFO L87 Difference]: Start difference. First operand 539 states and 711 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:23,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:23,130 INFO L93 Difference]: Finished difference Result 668 states and 885 transitions. [2021-11-02 23:13:23,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 23:13:23,130 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-02 23:13:23,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:23,135 INFO L225 Difference]: With dead ends: 668 [2021-11-02 23:13:23,135 INFO L226 Difference]: Without dead ends: 666 [2021-11-02 23:13:23,136 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:13:23,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-11-02 23:13:23,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 549. [2021-11-02 23:13:23,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 544 states have (on average 1.3290441176470589) internal successors, (723), 548 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:23,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 723 transitions. [2021-11-02 23:13:23,216 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 723 transitions. Word has length 42 [2021-11-02 23:13:23,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:23,216 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 723 transitions. [2021-11-02 23:13:23,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:23,217 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 723 transitions. [2021-11-02 23:13:23,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-02 23:13:23,218 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:23,218 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:23,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-11-02 23:13:23,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-02 23:13:23,434 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:13:23,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:23,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1321889269, now seen corresponding path program 1 times [2021-11-02 23:13:23,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:23,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937520869] [2021-11-02 23:13:23,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:23,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:23,453 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:13:23,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1065637433] [2021-11-02 23:13:23,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:23,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:23,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:23,456 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:23,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-02 23:13:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:23,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-02 23:13:23,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:25,592 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:25,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:25,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937520869] [2021-11-02 23:13:25,594 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:13:25,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065637433] [2021-11-02 23:13:25,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065637433] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:25,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:13:25,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-02 23:13:25,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652022534] [2021-11-02 23:13:25,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 23:13:25,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:25,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 23:13:25,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:13:25,597 INFO L87 Difference]: Start difference. First operand 549 states and 723 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:27,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:27,286 INFO L93 Difference]: Finished difference Result 725 states and 945 transitions. [2021-11-02 23:13:27,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 23:13:27,286 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-02 23:13:27,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:27,291 INFO L225 Difference]: With dead ends: 725 [2021-11-02 23:13:27,291 INFO L226 Difference]: Without dead ends: 717 [2021-11-02 23:13:27,292 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:13:27,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-11-02 23:13:27,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 582. [2021-11-02 23:13:27,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 577 states have (on average 1.318890814558059) internal successors, (761), 581 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:27,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 761 transitions. [2021-11-02 23:13:27,367 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 761 transitions. Word has length 43 [2021-11-02 23:13:27,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:27,367 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 761 transitions. [2021-11-02 23:13:27,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:27,368 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 761 transitions. [2021-11-02 23:13:27,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-02 23:13:27,369 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:27,369 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:27,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:27,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-02 23:13:27,590 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:13:27,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:27,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1565965267, now seen corresponding path program 1 times [2021-11-02 23:13:27,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:27,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350453791] [2021-11-02 23:13:27,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:27,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:27,601 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:13:27,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [777840683] [2021-11-02 23:13:27,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:27,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:27,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:27,619 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:27,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-02 23:13:28,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:28,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 23:13:28,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:28,381 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 23:13:28,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:28,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350453791] [2021-11-02 23:13:28,382 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:13:28,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777840683] [2021-11-02 23:13:28,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777840683] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:28,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:13:28,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-02 23:13:28,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058782697] [2021-11-02 23:13:28,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:13:28,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:28,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:13:28,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:13:28,384 INFO L87 Difference]: Start difference. First operand 582 states and 761 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:28,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:28,748 INFO L93 Difference]: Finished difference Result 770 states and 1014 transitions. [2021-11-02 23:13:28,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 23:13:28,749 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-02 23:13:28,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:28,754 INFO L225 Difference]: With dead ends: 770 [2021-11-02 23:13:28,755 INFO L226 Difference]: Without dead ends: 766 [2021-11-02 23:13:28,756 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:13:28,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-11-02 23:13:28,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 603. [2021-11-02 23:13:28,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 598 states have (on average 1.31438127090301) internal successors, (786), 602 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:28,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 786 transitions. [2021-11-02 23:13:28,850 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 786 transitions. Word has length 44 [2021-11-02 23:13:28,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:28,851 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 786 transitions. [2021-11-02 23:13:28,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:28,851 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 786 transitions. [2021-11-02 23:13:28,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-02 23:13:28,852 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:28,852 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:28,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:29,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:29,078 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:13:29,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:29,079 INFO L85 PathProgramCache]: Analyzing trace with hash -15075340, now seen corresponding path program 1 times [2021-11-02 23:13:29,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:29,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692182414] [2021-11-02 23:13:29,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:29,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:29,091 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:13:29,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1178413467] [2021-11-02 23:13:29,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:29,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:29,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:29,093 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:29,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-02 23:13:29,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:29,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 23:13:29,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:29,855 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:29,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:29,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692182414] [2021-11-02 23:13:29,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:13:29,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178413467] [2021-11-02 23:13:29,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178413467] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:29,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:13:29,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-02 23:13:29,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061309812] [2021-11-02 23:13:29,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 23:13:29,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:29,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 23:13:29,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:13:29,857 INFO L87 Difference]: Start difference. First operand 603 states and 786 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:30,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:30,020 INFO L93 Difference]: Finished difference Result 1073 states and 1426 transitions. [2021-11-02 23:13:30,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 23:13:30,021 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-02 23:13:30,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:30,025 INFO L225 Difference]: With dead ends: 1073 [2021-11-02 23:13:30,025 INFO L226 Difference]: Without dead ends: 629 [2021-11-02 23:13:30,027 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:13:30,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-11-02 23:13:30,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 621. [2021-11-02 23:13:30,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 616 states have (on average 1.3084415584415585) internal successors, (806), 620 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:30,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 806 transitions. [2021-11-02 23:13:30,142 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 806 transitions. Word has length 44 [2021-11-02 23:13:30,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:30,142 INFO L470 AbstractCegarLoop]: Abstraction has 621 states and 806 transitions. [2021-11-02 23:13:30,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:30,143 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 806 transitions. [2021-11-02 23:13:30,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-02 23:13:30,144 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:30,144 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:30,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:30,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:30,358 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:13:30,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:30,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1214368663, now seen corresponding path program 2 times [2021-11-02 23:13:30,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:30,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567081100] [2021-11-02 23:13:30,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:30,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:30,379 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:13:30,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [607306121] [2021-11-02 23:13:30,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:13:30,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:30,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:30,381 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:30,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-02 23:13:31,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:13:31,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:31,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 23:13:31,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:31,229 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:31,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:31,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567081100] [2021-11-02 23:13:31,230 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:13:31,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607306121] [2021-11-02 23:13:31,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607306121] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:31,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:13:31,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-02 23:13:31,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943127698] [2021-11-02 23:13:31,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:13:31,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:31,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:13:31,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:13:31,231 INFO L87 Difference]: Start difference. First operand 621 states and 806 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:31,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:31,463 INFO L93 Difference]: Finished difference Result 1061 states and 1395 transitions. [2021-11-02 23:13:31,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 23:13:31,464 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-02 23:13:31,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:31,468 INFO L225 Difference]: With dead ends: 1061 [2021-11-02 23:13:31,468 INFO L226 Difference]: Without dead ends: 703 [2021-11-02 23:13:31,470 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:13:31,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-11-02 23:13:31,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 669. [2021-11-02 23:13:31,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 664 states have (on average 1.2966867469879517) internal successors, (861), 668 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:31,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 861 transitions. [2021-11-02 23:13:31,570 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 861 transitions. Word has length 45 [2021-11-02 23:13:31,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:31,570 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 861 transitions. [2021-11-02 23:13:31,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:31,570 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 861 transitions. [2021-11-02 23:13:31,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-02 23:13:31,574 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:31,574 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:31,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:31,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:31,802 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:13:31,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:31,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1653911024, now seen corresponding path program 1 times [2021-11-02 23:13:31,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:31,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606386093] [2021-11-02 23:13:31,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:31,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:31,817 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:13:31,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318205600] [2021-11-02 23:13:31,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:31,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:31,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:31,819 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:31,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-02 23:13:32,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:32,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-02 23:13:32,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:33,833 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:33,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:33,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606386093] [2021-11-02 23:13:33,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:13:33,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318205600] [2021-11-02 23:13:33,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318205600] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:33,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:13:33,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-02 23:13:33,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520628900] [2021-11-02 23:13:33,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 23:13:33,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:33,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 23:13:33,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:13:33,835 INFO L87 Difference]: Start difference. First operand 669 states and 861 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:34,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:34,601 INFO L93 Difference]: Finished difference Result 827 states and 1055 transitions. [2021-11-02 23:13:34,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 23:13:34,602 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-02 23:13:34,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:34,607 INFO L225 Difference]: With dead ends: 827 [2021-11-02 23:13:34,607 INFO L226 Difference]: Without dead ends: 825 [2021-11-02 23:13:34,608 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:13:34,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-11-02 23:13:34,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 665. [2021-11-02 23:13:34,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 660 states have (on average 1.2984848484848486) internal successors, (857), 664 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:34,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 857 transitions. [2021-11-02 23:13:34,724 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 857 transitions. Word has length 46 [2021-11-02 23:13:34,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:34,725 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 857 transitions. [2021-11-02 23:13:34,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:34,725 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 857 transitions. [2021-11-02 23:13:34,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-02 23:13:34,730 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:34,730 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:34,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:34,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-02 23:13:34,952 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:13:34,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:34,952 INFO L85 PathProgramCache]: Analyzing trace with hash -927382991, now seen corresponding path program 1 times [2021-11-02 23:13:34,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:34,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957476711] [2021-11-02 23:13:34,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:34,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:34,966 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:13:34,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241560209] [2021-11-02 23:13:34,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:34,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:34,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:34,968 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:34,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-02 23:13:35,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:35,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 23:13:35,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:35,868 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:35,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:35,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957476711] [2021-11-02 23:13:35,868 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:13:35,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241560209] [2021-11-02 23:13:35,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241560209] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:35,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:13:35,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-02 23:13:35,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256234580] [2021-11-02 23:13:35,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:13:35,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:35,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:13:35,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:13:35,870 INFO L87 Difference]: Start difference. First operand 665 states and 857 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:36,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:36,052 INFO L93 Difference]: Finished difference Result 711 states and 902 transitions. [2021-11-02 23:13:36,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 23:13:36,053 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-02 23:13:36,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:36,056 INFO L225 Difference]: With dead ends: 711 [2021-11-02 23:13:36,056 INFO L226 Difference]: Without dead ends: 707 [2021-11-02 23:13:36,056 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:13:36,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-11-02 23:13:36,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 683. [2021-11-02 23:13:36,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 678 states have (on average 1.2935103244837758) internal successors, (877), 682 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:36,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 877 transitions. [2021-11-02 23:13:36,160 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 877 transitions. Word has length 49 [2021-11-02 23:13:36,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:36,161 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 877 transitions. [2021-11-02 23:13:36,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:36,161 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 877 transitions. [2021-11-02 23:13:36,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-02 23:13:36,162 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:36,163 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:36,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:36,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-02 23:13:36,378 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:13:36,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:36,379 INFO L85 PathProgramCache]: Analyzing trace with hash -41471547, now seen corresponding path program 2 times [2021-11-02 23:13:36,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:36,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353173177] [2021-11-02 23:13:36,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:36,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:36,390 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:13:36,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1816303550] [2021-11-02 23:13:36,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:13:36,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:36,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:36,393 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:36,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-02 23:13:37,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:13:37,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:37,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 23:13:37,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:37,565 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:37,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:37,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353173177] [2021-11-02 23:13:37,565 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:13:37,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816303550] [2021-11-02 23:13:37,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816303550] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:37,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:13:37,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-02 23:13:37,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836310006] [2021-11-02 23:13:37,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:13:37,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:37,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:13:37,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:13:37,567 INFO L87 Difference]: Start difference. First operand 683 states and 877 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:38,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:38,494 INFO L93 Difference]: Finished difference Result 1333 states and 1723 transitions. [2021-11-02 23:13:38,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-02 23:13:38,494 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-02 23:13:38,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:38,500 INFO L225 Difference]: With dead ends: 1333 [2021-11-02 23:13:38,500 INFO L226 Difference]: Without dead ends: 1331 [2021-11-02 23:13:38,501 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=416, Invalid=1564, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 23:13:38,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2021-11-02 23:13:38,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 713. [2021-11-02 23:13:38,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 708 states have (on average 1.2937853107344632) internal successors, (916), 712 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:38,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 916 transitions. [2021-11-02 23:13:38,595 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 916 transitions. Word has length 49 [2021-11-02 23:13:38,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:38,595 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 916 transitions. [2021-11-02 23:13:38,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:38,596 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 916 transitions. [2021-11-02 23:13:38,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 23:13:38,597 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:38,597 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:38,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-11-02 23:13:38,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:38,810 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:13:38,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:38,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1315150752, now seen corresponding path program 2 times [2021-11-02 23:13:38,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:38,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19319920] [2021-11-02 23:13:38,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:38,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:38,822 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:13:38,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2143829306] [2021-11-02 23:13:38,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:13:38,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:38,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:38,824 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:38,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-02 23:13:39,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:13:39,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:39,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-02 23:13:39,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:41,118 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:41,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:41,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19319920] [2021-11-02 23:13:41,119 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:13:41,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143829306] [2021-11-02 23:13:41,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143829306] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:41,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:13:41,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-02 23:13:41,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375130318] [2021-11-02 23:13:41,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 23:13:41,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:41,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 23:13:41,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:13:41,122 INFO L87 Difference]: Start difference. First operand 713 states and 916 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:42,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:42,300 INFO L93 Difference]: Finished difference Result 1032 states and 1329 transitions. [2021-11-02 23:13:42,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 23:13:42,301 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-02 23:13:42,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:42,306 INFO L225 Difference]: With dead ends: 1032 [2021-11-02 23:13:42,306 INFO L226 Difference]: Without dead ends: 1024 [2021-11-02 23:13:42,307 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:13:42,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-11-02 23:13:42,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 745. [2021-11-02 23:13:42,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 740 states have (on average 1.2891891891891891) internal successors, (954), 744 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:42,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 954 transitions. [2021-11-02 23:13:42,432 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 954 transitions. Word has length 50 [2021-11-02 23:13:42,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:42,432 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 954 transitions. [2021-11-02 23:13:42,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:42,432 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 954 transitions. [2021-11-02 23:13:42,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 23:13:42,434 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:42,434 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:42,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-11-02 23:13:42,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-02 23:13:42,641 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:13:42,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:42,642 INFO L85 PathProgramCache]: Analyzing trace with hash -223969367, now seen corresponding path program 2 times [2021-11-02 23:13:42,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:42,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187211818] [2021-11-02 23:13:42,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:42,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:42,655 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:13:42,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1584663701] [2021-11-02 23:13:42,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:13:42,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:42,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:42,657 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:42,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-02 23:13:43,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:13:43,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:43,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 23:13:43,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:43,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:43,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187211818] [2021-11-02 23:13:43,974 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:13:43,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584663701] [2021-11-02 23:13:43,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584663701] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:43,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:13:43,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-02 23:13:43,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633004218] [2021-11-02 23:13:43,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 23:13:43,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:43,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 23:13:43,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:13:43,976 INFO L87 Difference]: Start difference. First operand 745 states and 954 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:44,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:44,266 INFO L93 Difference]: Finished difference Result 1348 states and 1753 transitions. [2021-11-02 23:13:44,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 23:13:44,266 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-02 23:13:44,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:44,272 INFO L225 Difference]: With dead ends: 1348 [2021-11-02 23:13:44,272 INFO L226 Difference]: Without dead ends: 874 [2021-11-02 23:13:44,274 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:13:44,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-11-02 23:13:44,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 834. [2021-11-02 23:13:44,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 829 states have (on average 1.270205066344994) internal successors, (1053), 833 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:44,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1053 transitions. [2021-11-02 23:13:44,394 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1053 transitions. Word has length 51 [2021-11-02 23:13:44,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:44,394 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 1053 transitions. [2021-11-02 23:13:44,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:44,394 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1053 transitions. [2021-11-02 23:13:44,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-02 23:13:44,395 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:44,396 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:44,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:44,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-02 23:13:44,603 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:13:44,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:44,603 INFO L85 PathProgramCache]: Analyzing trace with hash 780160965, now seen corresponding path program 3 times [2021-11-02 23:13:44,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:44,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120287016] [2021-11-02 23:13:44,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:44,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:44,615 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:13:44,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1519938285] [2021-11-02 23:13:44,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:13:44,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:44,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:44,616 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:44,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-02 23:13:45,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-02 23:13:45,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:45,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 23:13:45,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:46,155 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-02 23:13:46,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:46,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120287016] [2021-11-02 23:13:46,156 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:13:46,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519938285] [2021-11-02 23:13:46,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519938285] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:46,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:13:46,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-02 23:13:46,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098845023] [2021-11-02 23:13:46,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:13:46,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:46,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:13:46,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:13:46,161 INFO L87 Difference]: Start difference. First operand 834 states and 1053 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:57,311 WARN L207 SmtUtils]: Spent 11.07 s on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2021-11-02 23:14:03,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:03,154 INFO L93 Difference]: Finished difference Result 868 states and 1095 transitions. [2021-11-02 23:14:03,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:14:03,154 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-02 23:14:03,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:03,160 INFO L225 Difference]: With dead ends: 868 [2021-11-02 23:14:03,160 INFO L226 Difference]: Without dead ends: 866 [2021-11-02 23:14:03,161 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:14:03,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2021-11-02 23:14:03,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 670. [2021-11-02 23:14:03,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 666 states have (on average 1.2597597597597598) internal successors, (839), 669 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:03,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 839 transitions. [2021-11-02 23:14:03,290 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 839 transitions. Word has length 52 [2021-11-02 23:14:03,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:03,291 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 839 transitions. [2021-11-02 23:14:03,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:03,291 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 839 transitions. [2021-11-02 23:14:03,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 23:14:03,292 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:03,293 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:03,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-02 23:14:03,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-02 23:14:03,518 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:14:03,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:03,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1601103788, now seen corresponding path program 2 times [2021-11-02 23:14:03,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:03,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471562387] [2021-11-02 23:14:03,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:03,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:03,536 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:14:03,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1185266030] [2021-11-02 23:14:03,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:14:03,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:03,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:14:03,547 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:14:03,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-02 23:14:04,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:14:04,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:14:04,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 23:14:04,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:14:04,964 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:14:04,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:04,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471562387] [2021-11-02 23:14:04,964 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:14:04,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185266030] [2021-11-02 23:14:04,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185266030] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:04,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:14:04,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-02 23:14:04,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187476021] [2021-11-02 23:14:04,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 23:14:04,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:04,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 23:14:04,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:14:04,966 INFO L87 Difference]: Start difference. First operand 670 states and 839 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:05,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:05,211 INFO L93 Difference]: Finished difference Result 709 states and 877 transitions. [2021-11-02 23:14:05,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 23:14:05,211 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-02 23:14:05,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:05,216 INFO L225 Difference]: With dead ends: 709 [2021-11-02 23:14:05,216 INFO L226 Difference]: Without dead ends: 705 [2021-11-02 23:14:05,217 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:14:05,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-11-02 23:14:05,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 674. [2021-11-02 23:14:05,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 670 states have (on average 1.2582089552238807) internal successors, (843), 673 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:05,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 843 transitions. [2021-11-02 23:14:05,353 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 843 transitions. Word has length 53 [2021-11-02 23:14:05,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:05,353 INFO L470 AbstractCegarLoop]: Abstraction has 674 states and 843 transitions. [2021-11-02 23:14:05,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:05,353 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 843 transitions. [2021-11-02 23:14:05,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 23:14:05,354 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:05,355 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:05,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-11-02 23:14:05,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-02 23:14:05,566 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:14:05,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:05,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1015954848, now seen corresponding path program 3 times [2021-11-02 23:14:05,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:05,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8389920] [2021-11-02 23:14:05,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:05,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:05,587 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:14:05,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1069797446] [2021-11-02 23:14:05,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:14:05,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:05,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:14:05,594 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:14:05,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-02 23:14:06,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 23:14:06,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:14:06,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-02 23:14:06,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:14:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-02 23:14:07,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:07,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8389920] [2021-11-02 23:14:07,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:14:07,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069797446] [2021-11-02 23:14:07,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069797446] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:07,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:14:07,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-02 23:14:07,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611408623] [2021-11-02 23:14:07,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:14:07,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:07,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:14:07,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:14:07,856 INFO L87 Difference]: Start difference. First operand 674 states and 843 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:08,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:08,575 INFO L93 Difference]: Finished difference Result 986 states and 1240 transitions. [2021-11-02 23:14:08,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 23:14:08,576 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-02 23:14:08,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:08,581 INFO L225 Difference]: With dead ends: 986 [2021-11-02 23:14:08,582 INFO L226 Difference]: Without dead ends: 978 [2021-11-02 23:14:08,583 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:14:08,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2021-11-02 23:14:08,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 718. [2021-11-02 23:14:08,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 714 states have (on average 1.2549019607843137) internal successors, (896), 717 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:08,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 896 transitions. [2021-11-02 23:14:08,749 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 896 transitions. Word has length 53 [2021-11-02 23:14:08,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:08,749 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 896 transitions. [2021-11-02 23:14:08,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:08,749 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 896 transitions. [2021-11-02 23:14:08,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-02 23:14:08,750 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:08,751 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:08,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-02 23:14:08,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-02 23:14:08,966 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:14:08,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:08,967 INFO L85 PathProgramCache]: Analyzing trace with hash -474089570, now seen corresponding path program 1 times [2021-11-02 23:14:08,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:08,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142701278] [2021-11-02 23:14:08,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:08,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:08,978 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:14:08,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1486221505] [2021-11-02 23:14:08,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:08,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:08,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:14:08,979 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:14:08,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-02 23:14:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:09,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 23:14:09,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:14:10,061 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:14:10,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:10,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142701278] [2021-11-02 23:14:10,061 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:14:10,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486221505] [2021-11-02 23:14:10,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486221505] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:10,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:14:10,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-02 23:14:10,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311366265] [2021-11-02 23:14:10,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 23:14:10,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:10,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 23:14:10,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:14:10,062 INFO L87 Difference]: Start difference. First operand 718 states and 896 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:10,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:10,264 INFO L93 Difference]: Finished difference Result 1112 states and 1429 transitions. [2021-11-02 23:14:10,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 23:14:10,264 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-02 23:14:10,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:10,267 INFO L225 Difference]: With dead ends: 1112 [2021-11-02 23:14:10,267 INFO L226 Difference]: Without dead ends: 756 [2021-11-02 23:14:10,268 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:14:10,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-11-02 23:14:10,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 746. [2021-11-02 23:14:10,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 742 states have (on average 1.2452830188679245) internal successors, (924), 745 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:10,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 924 transitions. [2021-11-02 23:14:10,383 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 924 transitions. Word has length 55 [2021-11-02 23:14:10,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:10,383 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 924 transitions. [2021-11-02 23:14:10,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:10,384 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 924 transitions. [2021-11-02 23:14:10,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-02 23:14:10,385 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:10,385 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:10,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-11-02 23:14:10,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:10,585 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:14:10,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:10,586 INFO L85 PathProgramCache]: Analyzing trace with hash 766336805, now seen corresponding path program 4 times [2021-11-02 23:14:10,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:10,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530516823] [2021-11-02 23:14:10,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:10,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:10,598 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:14:10,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1332883807] [2021-11-02 23:14:10,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:14:10,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:10,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:14:10,600 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:14:10,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-02 23:14:11,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:14:11,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:14:11,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-02 23:14:11,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:14:15,643 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:14:15,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:15,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530516823] [2021-11-02 23:14:15,643 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:14:15,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332883807] [2021-11-02 23:14:15,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332883807] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:15,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:14:15,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-02 23:14:15,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608043703] [2021-11-02 23:14:15,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:14:15,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:15,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:14:15,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:14:15,646 INFO L87 Difference]: Start difference. First operand 746 states and 924 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:19,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:19,201 INFO L93 Difference]: Finished difference Result 1148 states and 1444 transitions. [2021-11-02 23:14:19,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 23:14:19,201 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-02 23:14:19,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:19,205 INFO L225 Difference]: With dead ends: 1148 [2021-11-02 23:14:19,205 INFO L226 Difference]: Without dead ends: 912 [2021-11-02 23:14:19,206 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=282, Invalid=1124, Unknown=0, NotChecked=0, Total=1406 [2021-11-02 23:14:19,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2021-11-02 23:14:19,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 724. [2021-11-02 23:14:19,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 720 states have (on average 1.2472222222222222) internal successors, (898), 723 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:19,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 898 transitions. [2021-11-02 23:14:19,301 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 898 transitions. Word has length 57 [2021-11-02 23:14:19,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:19,301 INFO L470 AbstractCegarLoop]: Abstraction has 724 states and 898 transitions. [2021-11-02 23:14:19,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:19,301 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 898 transitions. [2021-11-02 23:14:19,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-02 23:14:19,302 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:19,302 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:19,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-02 23:14:19,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-02 23:14:19,526 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:14:19,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:19,527 INFO L85 PathProgramCache]: Analyzing trace with hash -2113709863, now seen corresponding path program 3 times [2021-11-02 23:14:19,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:19,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866923946] [2021-11-02 23:14:19,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:19,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:19,540 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:14:19,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1924970765] [2021-11-02 23:14:19,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:14:19,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:19,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:14:19,546 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:14:19,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-02 23:14:21,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-02 23:14:21,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:14:21,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 23:14:21,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:14:21,429 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:14:21,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:21,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866923946] [2021-11-02 23:14:21,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:14:21,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924970765] [2021-11-02 23:14:21,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924970765] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:21,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:14:21,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-02 23:14:21,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876630374] [2021-11-02 23:14:21,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 23:14:21,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:21,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 23:14:21,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:14:21,433 INFO L87 Difference]: Start difference. First operand 724 states and 898 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:21,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:21,682 INFO L93 Difference]: Finished difference Result 1187 states and 1512 transitions. [2021-11-02 23:14:21,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 23:14:21,682 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-02 23:14:21,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:21,686 INFO L225 Difference]: With dead ends: 1187 [2021-11-02 23:14:21,686 INFO L226 Difference]: Without dead ends: 831 [2021-11-02 23:14:21,687 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:14:21,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2021-11-02 23:14:21,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 770. [2021-11-02 23:14:21,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 766 states have (on average 1.2428198433420365) internal successors, (952), 769 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:21,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 952 transitions. [2021-11-02 23:14:21,811 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 952 transitions. Word has length 59 [2021-11-02 23:14:21,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:21,812 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 952 transitions. [2021-11-02 23:14:21,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:21,812 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 952 transitions. [2021-11-02 23:14:21,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-02 23:14:21,813 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:21,814 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:21,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-02 23:14:22,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:22,018 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:14:22,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:22,019 INFO L85 PathProgramCache]: Analyzing trace with hash 469187479, now seen corresponding path program 3 times [2021-11-02 23:14:22,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:22,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961037736] [2021-11-02 23:14:22,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:22,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:22,031 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:14:22,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1791053298] [2021-11-02 23:14:22,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:14:22,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:22,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:14:22,033 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:14:22,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-02 23:14:23,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-02 23:14:23,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-11-02 23:14:23,134 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-02 23:14:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 23:14:23,229 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-02 23:14:23,229 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-02 23:14:23,230 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-11-02 23:14:23,232 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-02 23:14:23,232 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-11-02 23:14:23,232 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-11-02 23:14:23,232 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-11-02 23:14:23,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-02 23:14:23,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:23,450 INFO L731 BasicCegarLoop]: Path program histogram: [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:23,453 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-02 23:14:23,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 11:14:23 BoogieIcfgContainer [2021-11-02 23:14:23,514 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-02 23:14:23,515 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-02 23:14:23,515 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-02 23:14:23,515 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-02 23:14:23,516 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:12:58" (3/4) ... [2021-11-02 23:14:23,518 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-02 23:14:23,587 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/witness.graphml [2021-11-02 23:14:23,588 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-02 23:14:23,589 INFO L168 Benchmark]: Toolchain (without parser) took 85501.33 ms. Allocated memory was 102.8 MB in the beginning and 453.0 MB in the end (delta: 350.2 MB). Free memory was 70.0 MB in the beginning and 104.8 MB in the end (delta: -34.8 MB). Peak memory consumption was 315.7 MB. Max. memory is 16.1 GB. [2021-11-02 23:14:23,589 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 102.8 MB. Free memory was 57.4 MB in the beginning and 57.4 MB in the end (delta: 42.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 23:14:23,590 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.49 ms. Allocated memory is still 102.8 MB. Free memory was 69.8 MB in the beginning and 77.8 MB in the end (delta: -7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-02 23:14:23,590 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.11 ms. Allocated memory is still 102.8 MB. Free memory was 77.8 MB in the beginning and 76.1 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 23:14:23,590 INFO L168 Benchmark]: Boogie Preprocessor took 25.19 ms. Allocated memory is still 102.8 MB. Free memory was 75.8 MB in the beginning and 74.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 23:14:23,591 INFO L168 Benchmark]: RCFGBuilder took 367.09 ms. Allocated memory is still 102.8 MB. Free memory was 74.7 MB in the beginning and 63.5 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-02 23:14:23,591 INFO L168 Benchmark]: TraceAbstraction took 84719.21 ms. Allocated memory was 102.8 MB in the beginning and 453.0 MB in the end (delta: 350.2 MB). Free memory was 62.9 MB in the beginning and 111.1 MB in the end (delta: -48.2 MB). Peak memory consumption was 303.7 MB. Max. memory is 16.1 GB. [2021-11-02 23:14:23,592 INFO L168 Benchmark]: Witness Printer took 72.84 ms. Allocated memory is still 453.0 MB. Free memory was 111.1 MB in the beginning and 104.8 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-02 23:14:23,594 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 102.8 MB. Free memory was 57.4 MB in the beginning and 57.4 MB in the end (delta: 42.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 251.49 ms. Allocated memory is still 102.8 MB. Free memory was 69.8 MB in the beginning and 77.8 MB in the end (delta: -7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.11 ms. Allocated memory is still 102.8 MB. Free memory was 77.8 MB in the beginning and 76.1 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.19 ms. Allocated memory is still 102.8 MB. Free memory was 75.8 MB in the beginning and 74.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 367.09 ms. Allocated memory is still 102.8 MB. Free memory was 74.7 MB in the beginning and 63.5 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 84719.21 ms. Allocated memory was 102.8 MB in the beginning and 453.0 MB in the end (delta: 350.2 MB). Free memory was 62.9 MB in the beginning and 111.1 MB in the end (delta: -48.2 MB). Peak memory consumption was 303.7 MB. Max. memory is 16.1 GB. * Witness Printer took 72.84 ms. Allocated memory is still 453.0 MB. Free memory was 111.1 MB in the beginning and 104.8 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L8] COND FALSE !(!cond) VAL [counter=0] [L8] COND FALSE !(!cond) VAL [counter=0] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [counter=0] [L34] EXPR counter++ VAL [counter=1] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [counter=1] [L41] EXPR counter++ VAL [counter=2] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [counter=2] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [counter=2] [L34] EXPR counter++ VAL [counter=3] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [counter=3] [L41] EXPR counter++ VAL [counter=4] [L41] COND TRUE counter++<10 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [counter=4] [L48] EXPR counter++ VAL [counter=5] [L48] COND TRUE counter++<10 [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L54] COND TRUE !(c >= 2 * v) VAL [counter=5] [L59] c = c - v [L60] k = k + d VAL [counter=5] [L41] EXPR counter++ VAL [counter=6] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [counter=6] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [counter=6] [L34] EXPR counter++ VAL [counter=7] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [counter=7] [L41] EXPR counter++ VAL [counter=8] [L41] COND TRUE counter++<10 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [counter=8] [L48] EXPR counter++ VAL [counter=9] [L48] COND TRUE counter++<10 [L11] COND FALSE !(!(cond)) VAL [counter=9] [L11] COND FALSE !(!(cond)) VAL [counter=9] [L11] COND FALSE !(!(cond)) VAL [counter=9] [L11] COND FALSE !(!(cond)) VAL [counter=9] [L54] COND TRUE !(c >= 2 * v) VAL [counter=9] [L59] c = c - v [L60] k = k + d VAL [counter=9] [L41] EXPR counter++ VAL [counter=10] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [counter=10] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [counter=10] [L34] EXPR counter++ VAL [counter=11] [L34] COND FALSE !(counter++<10) [L11] COND TRUE !(cond) VAL [counter=11] [L13] reach_error() VAL [counter=11] - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 40 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 84.5s, OverallIterations: 44, TraceHistogramMax: 5, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 33.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2016 SDtfs, 6014 SDslu, 8390 SDs, 0 SdLazy, 5691 SolverSat, 1036 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 11.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1743 GetRequests, 1188 SyntacticMatches, 0 SemanticMatches, 555 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2137 ImplicationChecksByTransitivity, 21.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=834occurred in iteration=37, InterpolantAutomatonStates: 537, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.5s AutomataMinimizationTime, 43 MinimizatonAttempts, 3983 StatesRemovedByMinimization, 39 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 18.6s InterpolantComputationTime, 1565 NumberOfCodeBlocks, 1502 NumberOfCodeBlocksAsserted, 62 NumberOfCheckSat, 1462 ConstructedInterpolants, 0 QuantifiedInterpolants, 11306 SizeOfPredicates, 333 NumberOfNonLiveVariables, 6542 ConjunctsInSsa, 869 ConjunctsInUnsatCore, 43 InterpolantComputations, 12 PerfectInterpolantSequences, 270/795 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-02 23:14:23,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acfac143-b2ee-426a-933d-95ce10a2f038/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE